CN102677911A - Maintaining and reinforcing method and structure directed towards aged concrete constructions - Google Patents
Maintaining and reinforcing method and structure directed towards aged concrete constructions Download PDFInfo
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- CN102677911A CN102677911A CN2012101755828A CN201210175582A CN102677911A CN 102677911 A CN102677911 A CN 102677911A CN 2012101755828 A CN2012101755828 A CN 2012101755828A CN 201210175582 A CN201210175582 A CN 201210175582A CN 102677911 A CN102677911 A CN 102677911A
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Abstract
The invention discloses a maintaining and reinforcing method and structure directed towards aged concrete constructions. The maintaining and reinforcing method comprises the following steps: (1) carrying out surface treatment for a to-be-restored part of an aged concrete construction and cleaning up sundries on the to-be-restored part; (2) preparing polymer-cement mortar and using the mortar to carry out preliminary filling and plugging for broken areas and fissures of the to-be-restored part; (3) preparing fiber reinforced plastic composite material (FRP) and bottom layer bonding material, and fixing the fiber reinforced plastic composite material (FRP) on the surface of to-be-restored part through a fixing and connecting component and the bottom layer bonding material; and (4) finally, spraying polymer-cement mortar until reaching the designed thickness. According to the maintaining and reinforcing method and structure provided by the invention, the polymer-cement mortar and the FPR are conjunctively utilized, and the respective advantages of the two materials are brought into full play, so that the good supporting effect is realized in the reinforcement of the aged concrete constructions.
Description
Technical field
The present invention relates to a kind of reinforcement means, relate in particular to the method and structure of the damaged concrete structure of a kind of use fibre reinforced composites (FRP) and polymer cement mortar maintenance and reinforcement to aging concrete structures such as old tunnel lining, bridge base plates.
Background technology
In recent years; In China; The concrete structures such as tunnel lining, bridge base plate, abutment, sewer that surpass certain time limit service time; Receive the influence of complex stress, rainfall, seepage and other rugged environment humidity and thermal field, aging phenomenon generally takes place, expose like crack, surface peeling and reinforcing bar etc.For the concrete structure that produces the crack, with its discarded construction again, cost is higher.The integrality of the structure that exerted an influence in crack like untimely processing, then possibly cause major accident.In order to prevent that the crack from further expanding, it is stable to keep the tunnel, need reinforce it.Because damaged concrete self also has certain intensity, can the heavy damage original structure when using extensive anchor pole, anchor cable or slip casting to repair.How when keeping the original structure bearing capacity, concrete structure to be carried out consolidation process, all be at home, outward a difficult problem.In addition, when commonsense method is reinforced the tunnel of runing, there is the problem that construction machinery is complicated and the construction period is long, can has a strong impact on normal traffic.
Summary of the invention
Task of the present invention is to provide a kind of maintenance and reinforcement method and structure to aging concrete structure.
Its technical solution is:
A kind of maintenance and reinforcement structure to aging concrete structure is characterized in that comprising: fibre reinforced composites (FRP), polymer cement mortar, bottom bonding material and fixed connecting piece; Said fibre reinforced composites are fixed on aging concrete structure position to be repaired through the fixed connecting piece bottom bonding material; Said polymer cement mortar; Be used for the damaged zone at position to be repaired is is tentatively filled and led up on the one hand; And/or the crack at position to be repaired carried out shutoff, and be used to be injected in aging concrete structure surface on the other hand, cover on the fibre reinforced composites (FRP); Itself and concrete structure are bonded to as a whole, polymer cement mortar itself has support action to the concrete structure that wears out.
A kind of maintenance and reinforcement method to aging concrete structure may further comprise the steps:
1. surfacing is carried out at aging concrete structure position to be repaired, the foreign material on the surface at position to be repaired are removed; Foreign material comprise lining cutting peel off the part and/or dust;
2. prepare polymer cement mortar, use polymer cement mortar the damaged zone at position to be repaired tentatively to be filled and led up, and/or shutoff is carried out in the crack of repairing the position from a surperficial side;
3. prepare fibre reinforced composites (FRP) and bottom bonding material, fibre reinforced composites (FRP) are fixed on the surface at position to be repaired through fixed connecting piece and bottom bonding material;
4. on step basis 3., the spraying polymer cement mortar is until reaching design thickness;
Above-mentioned polymer cement mortar is to select for use emulsified powdered resin, extraordinary short fiber, fines and water to be mixed and made into, and by weight ratio, wherein solid material (comprising emulsified powdered resin, extraordinary short fiber and fines) is 84 parts, 16 parts in water.
The profile of above-mentioned fibre reinforced composites (FRP) is the sheet sheet material that has rectangle or square space.
The thickness of above-mentioned fibre reinforced composites (FRP) is 2～8mm; The design thickness of polymer cement mortar is 70～150mm.
The said fixing connector can be selected rivet for use.
The present invention has following useful technique effect:
The present invention utilizes the polymer cement mortar adhesive power good to inorganic material, is bonded to fibre reinforced composites (FRP) and concrete structure as a whole.FRP has good tensile property, can effectively reduce lining cutting surface tensile stress, suppresses the generation and the expansion in crack, particularly open crack.Polymer cement mortar itself has higher intensity, and concrete surface is played good maintenance effect, also can certain supporting resistance be provided for works.Through both being used in combination, give full play of two kinds of materials advantage separately,, old concrete structure can obtain good supporting effect when being reinforced.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further:
Fig. 1 is the maintenance and reinforcement structure partial cross section schematic diagram to aging concrete structure according to the invention.
Marginal data: 1-fibre reinforced composites (FRP), 2-polymer cement mortar, 3-fixed connecting piece, 4-bottom bonding material, 5-concrete structure to be repaired, 6-distress in concrete, 7-concrete damage zone.
The specific embodiment
A kind of maintenance and reinforcement method and structure to aging concrete structure specifically may further comprise the steps:
Step 1 is carried out surfacing to aging concrete structure 5 positions to be repaired, and the foreign material on the surface at position to be repaired are removed; Foreign material comprise lining cutting peel off the part and/or dust.
Step 2, preparation polymer cement mortar 2 uses polymer cement mortar 2 from a surperficial side the damaged zone 7 at position to be repaired tentatively to be filled and led up, and/or shutoff is carried out in the crack 6 of repairing the position.
Step 3 is prepared fibre reinforced composites (FRP) 1 and bottom bonding material 4, through fixed connecting piece 3 and bottom bonding material 4 fibre reinforced composites (FRP) 1 is fixed on the surface at position to be repaired.
Step 4, on the basis of step 3, spraying polymer cement bonded sand 2 slurries are until reaching design thickness.
Above-mentioned polymer cement mortar is to select for use emulsified powdered resin, extraordinary short fiber, fines and water to be mixed and made into, and by weight ratio, wherein solid material (comprising emulsified powdered resin, extraordinary short fiber, fines) is 84 parts, 16 parts in water.Above-mentioned emulsified powdered resin can be selected commodity ' Sabu15 ' series of Japanese SUNMATE ' S company for use.
Aforesaid way is continued to make following explanation:
Position to be repaired is being carried out in the surface treatment process, part and dust and other impurities removing are being peeled off in the lining cutting on surface.Through the damaged zone of aging concrete structure tentatively being filled and led up in a surperficial side spraying polymer cement mortar, and the filling crack.Through rivet FRP is fixed on the surface at position to be repaired then.Spray bottom bonding material subsequently.Last spraying polymer cement mortar reaches design thickness.
The profile of above-mentioned fibre reinforced composites (FRP) is the sheet sheet material that has rectangle or square space.FRP has light weight, and intensity is high, is convenient to cutting and installation, has the characteristics of very superior resistance to chemical attack.Thickness can according to measuring, be advisable with 4.5mm between 2～8mm.It also has ageing-resistant characteristic, and application life is more than 50 years.It cuts simple installation, need not to get angry and heavy-duty machinery, only needs a small amount of manual work and electric tools, makes installation cost also greatly reduce, and has also accelerated speed of application in addition, has reduced the interference that construction causes.Through rivet FRP is fixed on position to be repaired, very little to the influence of original structure.In addition, designability is strong, and size is versatile and flexible, can shape according to on-the-spot needs.
Above-mentioned polymer cement mortar, its characteristics comprise: mixed construction is simple, workable, have higher crack resistance, inorganic material had good adhesive power, and have favorable durability.Sprayed construction method thickness can suitably be selected as the case may be, is advisable with 70～150mm.
Above-mentionedly fibre reinforced composites (FRP) are fixed on position to be repaired through rivet; The relative concrete structure of its physical dimension is very little; Use it very little to the influence of original structure, help keeping the intensity of original structure, its shape can suitably be chosen as the case may be.
In addition, should note when construction, will guaranteeing the surface that concrete structure is in good order and condition, will carry out cleaning for the place that surface peeling is serious.Zone for badly broken will tentatively be filled and led up and the shutoff crack, to guarantee repairing effect.
Modulus of elasticity through test FRP is 1.4 * 10
5N/mm
2, tensile strength is 1.4 * 10
3N/mm
2(28 days), the average adhesion strength between polymer cement mortar is 2.4N/mm
2, the average shear rigidity of the adhesive surface of FRP and polymer cement mortar is 8.0kN/mm
2/ m (28 days).
The above embodiment is a kind of of the more preferably concrete embodiment of the present invention, and common variation that those skilled in the art carries out in technical scheme scope of the present invention and replacement all should be included in protection scope of the present invention.
Claims (5)
1. the maintenance and reinforcement structure to aging concrete structure is characterized in that comprising: fibre reinforced composites (FRP), polymer cement mortar, bottom bonding material and fixed connecting piece; Said fibre reinforced composites are fixed on aging concrete structure position to be repaired through the fixed connecting piece bottom bonding material; Said polymer cement mortar; Be used for the damaged zone at position to be repaired is is tentatively filled and led up on the one hand; And/or the crack at position to be repaired carried out shutoff, and be used to be injected in aging concrete structure surface on the other hand, cover on the fibre reinforced composites (FRP); Itself and concrete structure are bonded to as a whole, polymer cement mortar itself has support action to the concrete structure that wears out.
2. maintenance and reinforcement method to aging concrete structure is characterized in that may further comprise the steps:
1. surfacing is carried out at aging concrete structure position to be repaired, the foreign material on surface, position to be repaired are removed; Foreign material comprise lining cutting peel off the part and/or dust;
2. prepare polymer cement mortar, use polymer cement mortar that the damaged zone at position to be repaired is is tentatively filled and led up, and/or shutoff is carried out in the crack of repairing the position;
3. prepare fibre reinforced composites (FRP) and bottom bonding material, fibre reinforced composites (FRP) are fixed on the surface at position to be repaired through fixed connecting piece and bottom bonding material;
4. on step basis 3., the spraying polymer cement mortar is until reaching design thickness;
Above-mentioned polymer cement mortar is to select for use emulsified powdered resin, extraordinary short fiber, fines and water to be mixed and made into, and by weight ratio, wherein solid material (comprising emulsified powdered resin, extraordinary short fiber, fines) is 84 parts, 16 parts in water.
3. a kind of maintenance and reinforcement method to aging concrete structure according to claim 2, it is characterized in that: the profile of said fibre reinforced composites (FRP) is the sheet sheet material that has rectangle or square space.
4. a kind of maintenance and reinforcement method according to claim 2 to aging concrete structure, it is characterized in that: the thickness of said fibre reinforced composites (FRP) is 2～8mm; The design thickness of polymer cement mortar is 70～150mm.
5. a kind of maintenance and reinforcement method to aging concrete structure according to claim 2, it is characterized in that: said fixed connecting piece can be selected rivet for use.
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| CN2012101755828A CN102677911A (en) | 2012-05-23 | 2012-05-23 | Maintaining and reinforcing method and structure directed towards aged concrete constructions |
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| CN2012101755828A CN102677911A (en) | 2012-05-23 | 2012-05-23 | Maintaining and reinforcing method and structure directed towards aged concrete constructions |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100101A (en) * | 2014-07-25 | 2014-10-15 | 杭州固华复合材料科技有限公司 | Reinforcing structure and method for concrete construction with local damage |
| CN104453939A (en) * | 2015-01-04 | 2015-03-25 | 上海友德节能技术发展有限公司 | Lightweight composite material supporting structural component for track traffic tunnel and mounting method thereof |
| CN105839940A (en) * | 2016-05-03 | 2016-08-10 | 苏州英力普建筑装饰材料有限公司 | Wall crack strengthened reinforcement structure made of epoxy resin slurry |
| CN105888691A (en) * | 2016-04-26 | 2016-08-24 | 北京中科嘉固科技有限公司 | Assembling and construction method of tunnel rapid reinforcement technology |
| CN105927246A (en) * | 2016-03-23 | 2016-09-07 | 中山大学 | High-pressure tunnel lining concrete uplift failure repair method |
| CN106013838A (en) * | 2016-07-22 | 2016-10-12 | 广东电网有限责任公司电力科学研究院 | Method and device for reinforcing concrete power transformation structure frame |
| CN109184248A (en) * | 2018-09-18 | 2019-01-11 | 西南交通大学 | Reinforcement means is cut to reinforced beam using CFRP grid-PCM reinforcing layer |
| CN110886505A (en) * | 2019-11-19 | 2020-03-17 | 上海天补材料科技有限公司 | In-situ repairing and reinforcing method for wall heat-insulating system |
| CN113090058A (en) * | 2021-03-18 | 2021-07-09 | 中国水利水电第九工程局有限公司 | Construction method for repairing and reinforcing old concrete |
| CN113323112A (en) * | 2021-06-07 | 2021-08-31 | 武汉点土石金环保科技有限公司 | Unorganized natural drainage structure in large earthen site and construction method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100101A (en) * | 2014-07-25 | 2014-10-15 | 杭州固华复合材料科技有限公司 | Reinforcing structure and method for concrete construction with local damage |
| CN104453939A (en) * | 2015-01-04 | 2015-03-25 | 上海友德节能技术发展有限公司 | Lightweight composite material supporting structural component for track traffic tunnel and mounting method thereof |
| CN104453939B (en) * | 2015-01-04 | 2016-06-15 | 上海友德节能技术发展有限公司 | Rail tunnel lightweight compound material supporting structural member and installation method thereof |
| CN105927246A (en) * | 2016-03-23 | 2016-09-07 | 中山大学 | High-pressure tunnel lining concrete uplift failure repair method |
| CN105888691A (en) * | 2016-04-26 | 2016-08-24 | 北京中科嘉固科技有限公司 | Assembling and construction method of tunnel rapid reinforcement technology |
| CN105839940B (en) * | 2016-05-03 | 2018-11-27 | 芜湖文青机械设备设计有限公司 | A kind of enhanced reinforced structure of wall body slit of epoxy resin slurry |
| CN105839940A (en) * | 2016-05-03 | 2016-08-10 | 苏州英力普建筑装饰材料有限公司 | Wall crack strengthened reinforcement structure made of epoxy resin slurry |
| CN106013838A (en) * | 2016-07-22 | 2016-10-12 | 广东电网有限责任公司电力科学研究院 | Method and device for reinforcing concrete power transformation structure frame |
| CN109184248A (en) * | 2018-09-18 | 2019-01-11 | 西南交通大学 | Reinforcement means is cut to reinforced beam using CFRP grid-PCM reinforcing layer |
| CN113389399A (en) * | 2018-09-18 | 2021-09-14 | 西南交通大学 | Shear reinforcement manufacturing method, shear reinforcement evaluation device and shear reinforcement evaluation method for reinforced concrete beam |
| CN110886505A (en) * | 2019-11-19 | 2020-03-17 | 上海天补材料科技有限公司 | In-situ repairing and reinforcing method for wall heat-insulating system |
| CN113090058A (en) * | 2021-03-18 | 2021-07-09 | 中国水利水电第九工程局有限公司 | Construction method for repairing and reinforcing old concrete |
| CN113323112A (en) * | 2021-06-07 | 2021-08-31 | 武汉点土石金环保科技有限公司 | Unorganized natural drainage structure in large earthen site and construction method thereof |
| CN113323112B (en) * | 2021-06-07 | 2023-12-22 | 湖北省点土石金工程科技有限公司 | Large-scale soil relic tissue-free natural drainage structure and construction method thereof |
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Application publication date: 20120919 |